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  Bicycle derailleurUSPTO Application #: 20080064544Title: Bicycle derailleur Abstract: A bicycle derailleur mounting structure includes a base member and a stopper. The base member includes a first portion configured for attachment to a bicycle frame. The first portion of the base member has a first side surface and a second side surface with an aperture extending between the first and second side surfaces. The stopper is coupled to the base member between the first and second side surfaces. The stopper is configured for setting an angular position of the base member relative to the bicycle frame. (end of abstract) Agent: GlobalIPCounselors, LLP - Washington, DC, US Inventors: Souta Yamaguchi, Shinya Oseto USPTO Applicaton #: 20080064544 - Class: 474 80 (USPTO) The Patent Description & Claims data below is from USPTO Patent Application 20080064544. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001]1. Field of the Invention [0002]This invention generally relates to a bicycle rear derailleur. More specifically, the present invention relates to a stopper that limits pivotal movement of a base member of the bicycle rear derailleur relative to the bicycle frame. [0003]2. Background Information [0004]Bicycling is becoming an increasingly more popular form of recreation as well as a means of transportation. Moreover, bicycling has become a very popular competitive sport for both amateurs and professionals. Whether the bicycle is used for recreation, transportation or competition, the bicycle industry is constantly improving the various components of the bicycle. One component that has been extensively redesigned is the bicycle rear derailleur. [0005]In many rear derailleur configurations, a base member of the rear derailleur includes a mounting axle that extends through the base member and into a portion of the bicycle frame. The mounting axle allows for limited pivotal movement of the base member relative to the bicycle frame. Further, such rear derailleurs often include a stopper member disposed between the base member and the bicycle frame that restricts the pivotal movement of the base member relative to the bicycle frame. Additionally the stopper member and/or bicycle frame can include an adjustment for setting an angular stop position of the base member relative to the bicycle frame. In some rear derailleur configurations, the adjustment for setting the angular stop position of the base member includes an adjuster bolt extending through a threaded aperture in the base member that contact the stopper member providing angular stop position adjustment. [0006]With the stopper member disposed between the base member and the bicycle frame, the base member is spaced apart from the bicycle frame. In order to avoid rocking movement in a direction perpendicular to the pivotal movement of the base member about the mounting axle, the base member must be widened and the mounting axle must be elongated. The additional length of the mounting axle and widened base member are not desirable in current rear derailleur designs where mass and space are important design considerations. [0007]In view of the above, it will be apparent to those skilled in the art from this disclosure that there exists a need for an improved rear derailleur that includes a stopper member configuration that does not require a widened base member and elongated mounting axle. This invention addresses this need in the art as well as other needs, which will become apparent to those skilled in the art from this disclosure. SUMMARY OF THE INVENTION [0008]One object of the present invention is to provide a simple mechanism for adjusting an angular stop position of a base member of a rear derailleur without increasing rocking or pivotal movement of the base member relative to the frame of a bicycle. [0009]Another object of the present invention is to provide a stopper for a base member of a rear derailleur with a minimum overall mounting axle length. [0010]In accordance with one aspect of the present invention, a bicycle derailleur mounting structure includes a base member and a stopper. The base member includes a first portion configured for attachment to a bicycle frame. The first portion of the base member has a first side surface and a second side surface with an aperture extending between the first and second side surfaces. The stopper is coupled to the base member between the first and second side surfaces. The stopper is configured for setting an angular position of the base member relative to the bicycle frame. [0011]These and other objects, features, aspects and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses a preferred embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS [0012]Referring now to the attached drawings which form a part of this original disclosure: [0013]FIG. 1 is a side elevational view of a bicycle showing a rear derailleur in accordance with one embodiment of the present invention; [0014]FIG. 2 is a perspective view of an outboard side of the rear derailleur showing a base member with a stopper in accordance with one embodiment of the present invention; [0015]FIG. 3 is a perspective view of an inboard side of the base member of the rear derailleur installed on the bicycle with portions of the rear derailleur removed to show features of the stopper in accordance with one embodiment of the present invention; [0016]FIG. 4 is a perspective view of the base member and stopper shown completely removed from the rear derailleur in accordance with one embodiment of the present invention; [0017]FIG. 5 is another perspective view of the base member and stopper shown removed from the rear derailleur in accordance with one embodiment of the present invention; [0018]FIG. 6 is an exploded perspective view of the base member and stopper showing an adjustment bolt, a stopper member and a washer of the stopper in accordance with one embodiment of the present invention; [0019]FIG. 7 is an exploded perspective view of the stopper showing the stopper member and the washer of the stopper in accordance with one embodiment of the present invention; [0020]FIG. 8 is another perspective view of the base member and stopper shown removed from the rear derailleur in accordance with one embodiment of the present invention; and [0021]FIG. 9 is a cross-section of the base member and the stopper taken along the line 9-9 in FIG. 3. Continue reading... Full patent description for Bicycle derailleur Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Bicycle derailleur patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Bicycle derailleur or other areas of interest. ### Previous Patent Application: Three axis drive apparatus Next Patent Application: Bicycle rear derailleur Industry Class: Endless belt power transmission systems or components ### FreshPatents.com Support Thank you for viewing the Bicycle derailleur patent info. 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